Slang intensifier used before adjectives or verbs to mean 'extremely' or 'like hell'. Often carries a rough or emphatic tone.
It's hot as hell today.
That movie was boring as hell.
I spent a shitload of money.
There are a shitload of people.
Slang expression usually written in kana; katakana クソ is common for emphasis.
Kanji spelling is rare and may look literary or old-fashioned for this slang expression.
Alternate kanji spelling, very rare.
Compound of 糞 (くそ, 'shit') + ほど ('extent, degree'), literally 'to the extent of shit', used as a vulgar intensifier or quantifier.